This step is somewhat misleading, but I don't feel another animation should be necessary. Before you attempt a full out cascade, try doing 5 throws and 5 catches, again, just to get used to the timing.
Once you can make 5 throws and 5 catches relatively regularly, try to see how long you can keep the pattern going for. Alternate frequently between only doing 5 throws, and seeing how long you can keep going without the cascade falling apart.
It will take a lot of practice to get this right, I'm still working on it!